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SR‐PCI of a transversely cropped right‐sided IAC near the fundus, using composite with shading technique. The arachnoid membranes (interrupted line) surround the cranial nerves. In one place (curly bracket), the arachnoid adheres to the bony wall of the IAC. Inset shows a more lateral section, verifying that the membrane is tagged (arrows) to the dura wall (blue line).
